fixes #4080: Status code 500 when disapproving through API

app/controllers/moderator/post/disapprovals_controller.rb

@@ -8,7 +8,7 @@ module Moderator
       def create
         cookies.permanent[:moderated] = Time.now.to_i
         @post_disapproval = PostDisapproval.create(post_disapproval_params)
-        respond_with(@post_disapproval)
+        respond_with(@post_disapproval, location: moderator_post_disapprovals_path)
       end
 
       def index

test/functional/moderator/post/disapprovals_controller_test.rb

@@ -18,6 +18,15 @@ module Moderator
             end
             assert_response :success
           end
+
+          context "for json" do
+            should "render" do
+              assert_difference("PostDisapproval.count", 1) do
+                post_auth moderator_post_disapprovals_path, @admin, params: { post_disapproval: { post_id: @post.id, reason: "breaks_rules" }, format: "json" }
+              end
+              assert_response :success 
+            end
+          end
         end
       end
     end